Malicious PDF — malware analysis report

Static analysis result for SHA-256 bdedd64b96ebf39b…

MALICIOUS

PDF

82.5 KB Created: 2021-09-22 19:08:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2c64a5db5e5e9df099f6b06a689c51bd SHA-1: 397397618210bf2a3343a40740e421a943c94011 SHA-256: bdedd64b96ebf39b04f895604d9ba4728dbc398827d660af2a8d3b53214924ec
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, with a high-confidence heuristic identifying it as a link farm on disposable hosting. The ML classifier also flagged the PDF as malicious. While no scripts were extracted, the primary attack pattern appears to be directing users to potentially malicious or deceptive websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://cargotavio.ru/files/file/41126916758.pdf In PDF document text
    • http://thrifty-uy.com/files/others/36611540947.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1614903c1cd6b5---zedefiwovini.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/71987805175.pdfIn PDF document text
    • https://cicadit.ro/UserFiles/file/vodom.pdfIn PDF document text
    • http://sinorarechem.com/upload/files/wadimidavafevas.pdfIn PDF document text
    • http://top1np.com/ckfinder/userfiles/files/49172640639.pdfIn PDF document text
    • https://mancomunidadvaldizarbe.com/userfiles/files/40252705831.pdfIn PDF document text
    • http://ziguratex.com/helpdesk/app/webroot/img/userfiles/files/48062453160.pdfIn PDF document text
    • http://synagoge-stommeln.de/ckfinder/userfiles/files/rajam.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/16146d8675e599---nobazopewevovafibekunig.pdfIn PDF document text
    • http://mayinmaunhat.com/upload/files/semisuxevakakaregewis.pdfIn PDF document text
    • https://libyamonitor.com/sites/all/libraries/ckfinder/userfiles/files/zuvivenipojex.pdfIn PDF document text
    • http://wernersuarez.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/51224210326.pdfIn PDF document text
    • http://xaydunglenguyen.vn/upload/files/48675e.pdfIn PDF document text
    • http://obrienbuilders.com/userfiles/file/kiniraxuropumoxufoboga.pdfIn PDF document text
    • https://xlux.vn/wp-content/plugins/super-forms/uploads/php/files/pqsh97hbvboq3l6mm0i6jupaf2/72757347182.pdfIn PDF document text
    • https://weldingportal.it/userfiles/file/29634037758.pdfIn PDF document text
    • http://bandenplaats.nl/cmsimages/file/lijobilisibasulegig.pdfIn PDF document text
    • https://mr-alian.com/upload/ckfinder/files/dixazejuwipopamosorefi.pdfIn PDF document text
    • http://aktifithalat.com/resimlerfiles/15581303584.pdfIn PDF document text
    • https://anctools.com/ckfinder/userfiles/files/fufejijapiliwimiwovusiwu.pdfIn PDF document text
    • https://oddluzanie.net/userfiles/file/fogulutuvusobeliberirid.pdfIn PDF document text
    • https://pracowniatechart.pl/fckpliki/file/55227183109.pdfIn PDF document text
    • http://clinicaveterinariabilancino.it/userfiles/files/kepulutiraxi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=son+of+the+mob+pdfPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFD4 10408 bytes
SHA-256: f3c201cdfe6dd98e97738499963ba12e1fb43d34fb48539be9f8a56cbbf9ff54
font_01_sfnt_off0000f6fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FA 17492 bytes
SHA-256: 2b41b9e6871725f4709aaab5a69af651b4d090f9eae5118355d81b7531222e2c
font_02_sfnt_off000124a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124A3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1